Apparatus for clarifying waste waters.



R. scmume APPARATUS FOR CLARIFYING WASTE WATERS.

' APPLICATION FILED MAR. 5' 1912.

1,1 9,59, Patented July 25,1916. I

an sra rns narnur numb nUnoLF' SCHILLING, or scHloN BEnG, GERMANY.

APPARATUS FOR CLARIFYING WASTE WATERS.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed March 5, 1912. Serial lie. 681,793.

To all whom it'mag concern:

Beit known that I, IRUDOLF SCHILLING, a

floating and suspended substances arere-' moved from the top, whereas the waste waters containing the heavier substance are conducted away downward wlthout any previous separation or depositing of the heavier substances, which are carried along by the escaping waters This has been heretofore effected by increasing the flowing velocity of the escaping water by providing sloping and downwardly directed sliding surfaces comprising two vertically disposed coneshaped members placed bottom to bottom and by drawing together the walls of the basin toward the outflow pipe which is placed adjacent the apex of the lower one of said cone-shaped members. By carrying the outflow pipe up sufficiently high any flowing away of the floating layer is prevented. Now it has been discovered that the flowing velocity of the escaping water can be sufficiently increased even without providing the downwardly directed sliding surfaces but merely by drawing together the walls of the basin toward the outflow spot of the water situated at the narrowest part I of the lower portions of the basin.

Apparatus have already been described for clarifying waste waters which are also of basin shape and in which the walls are drawn together toward a deeply situated point Generally speaking these apparatus require the flowing velocity of the water to be clarified to be decreased and not increased. Consequently with these apparatus the liquid enters at the narrowest spot and flows out at the broadest spot ofthe basin. v

I shall now describe my invention with reference to the accompanying drawing which shows one form of execution of the basin according to the present invention in which Figure l is a plan view; Fig. 2 is a sec tion through one form of construction.

The separation out of the suspended ma terials is effected in a basin a with a downwardly sloping. bottom Z and vertical walls I: and m attached thereto which converge toward each other to provide a basin which is relatively narrow and deep at one end 9 and broad and shallow at the other end 0. The waste waters flow into the basin, in the direction of the arrow at the broad end 0 of the same, through the pipe or channel 6. A'nuinber of buffer walls 05 are arranged in the basin in front of the inlet opening and serve for stilling the inflowing waters in v the known manner. .The lower ends of the buffer walls are prolonged consecutively from the mouth of the inlet Z) correspondingly to the slope ofthe bottom of the basin.

' Beneath the last bulferwall or just at the back of the same a step 6 may be provided on the bottom of the basin, for the purpose of occasioning a sudden acceleration of the flowing velocity of the waste waters and of the heavy substances, although this step is not absolutely necessary for the intended method of working of-the apparatus. The buffer walls arranged behind the inlet gen- .erally suflice for eflecting the desired separating process in waste waters. The waste waters and heavy substances pass through the opening it and rise up in the pipe f, flowing off at about the height of the inlet b.

In operation the waste waters passing into the basin a through the inlet 7) are first stilled by the bufler walls (Z while at the same time there is a preliminary separating out of the floating and suspended substances. The floating and suspended substances are then separated out behind the last butter wall and rise to the top. The waste waters and heavy substances, however, are gradually accelerated, for which a greater impulse can be obtained beforehand by falling down from a step (1. The acceleration of the heavy sub stances constantly increased during the flowing away along the descending and narrowed bottom of the basin imparts to the heavy substances a moving energy which permits of their removal simultaneously with the exhaust water through the pipe 7' without any previous precipitation or depositing. In order to reach the outflow opening the waste waters and heavy substances must rise up on the pipe f to about the height of the inlet 7) so that any disturbing or drawing away of the floating layer formed be tween the innermost butler wall and the narrowed end of the basin a is prevented I claim: 1. An apparatus for clarifying waste waters by separating out the floating matter and matter of light specific gravity, comprising a tank having a sloping bottom and converging side walls, said walls forming with said bottom a basin which is narrow and deep at one end and broad and shallow at the other end, an inlet conduit entering into the broad and shallow end of the basin above the level of the liquid contained in the tank, an outlet conduit in unrestricted communication with the narrow, deep end of the basin adjacent its bottom, said outlet conduit-being of sufiiciently small cross sec-.

tional area to cause the force of the liquid discharging therethrough from the basin to carry with it the heavier matter which sinks to the bottom of the basin, and baffle plates in said basin for reducing the surface flow 01": the liquid in the tank.

2; An apparatus for clarifying waste waters by separating out, the floating matter and matter of light specific gravity, comprising a tank having a sloping bottom and converging side walls, said walls forming with said bottom a basin which is narrow and deepzat one end and broad and shallow at the other end, an inlet conduit entering into the broad and shallow end of the basin above the level of the liquid contained in the tank, an outlet conduit in unrestricted communication with the narrow, deep end ofthe basin adjacent its bottom, said outlet conduit being of sufiiciently small cross sectional area to cause the force of the liquid discharging therethrough from the basin to carry with it the heavier matter which sinks to the bottom of the basin and having its discharge opening at a level slightly below the level of the discharge through the inlet conduit, and bafiie plates in said basin for reducing the surface flow of the liquid in the tank.

In testimony whereof, I afiix my signature.

in the presence of two witnesses.

' RUDOLF 'SCHILLING.

4 Witnesses:

' HENRY HASPER,

WOLDEMAR HAUPT. 

